No, the clutch and flywheel will not transfer over with a ca18det swap...different belt housings on the tranny. Suspension, brake upgrades, and a lsd will transfer over. I wouldn't waste my money on engine mods on the ka because almost little, if any will transfer over on the swap. Just focus on brakes and suspension as they will transfer with any swap.... <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/cool.gif" border="0" valign="absmiddle" alt='

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As for the jic...no info here, but check with google or another search engine.
Downpipe on the ka? Do you mean a mid pipe or racing pipe?
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